Crane of a wind turbine

Abstract

Crane of a wind turbine (200), comprising a fixed part (1), a pivoting part (2) which is attached with rotational freedom to the fixed part (1), a support (3) which is attached to the pivoting part (2), a winch (4), a wiring system between the winch (4) and the support (3), and a guide for guiding the wiring system along its path. The wiring system comprises a single wire (6), and the guide comprises a pulley (52) in the fixed part (1) for guiding it through said fixed part (1), and a pulley (53) in the pivoting part (2) for guiding it through said pivoting part (2). The wire (6) comprises a section (60) between the two pulleys (52, 53), which goes through the center of rotation of the pivoting part (2) with respect to the fixed part (1) connecting both parts (1, 2).

Description

TECHNICAL FIELD[0001]The present invention relates to cranes for wind turbines, and more specifically to cranes for wind turbines that are fixed on the wind turbine itself.PRIOR ART[0002]The development of new wind-driven power generators (or wind turbines) has resulted in larger and more powerful ones. Large wind turbines allow installing more electric power in one and the same site and reduce the visual impact of a wind farm formed by several wind turbines.[0003]Each wind turbine comprises a fixed tower raised above the ground and a nacelle in the upper part of the tower. The nacelle comprises at least one blade (generally a plurality of blades), and an electric generator housed inside a nacelle cover. The electric generator in turn comprises a stator and rotor to enable generating electric energy from the rotation of the rotor, and the rotor is connected to the blades rotating integrally therewith. The blades are exposed to the wind, such that they are adapted for rotating when p...

AI Technical Summary

Benefits of technology

The technical effect of the patent text is that the crane described in it uses a single wire to support heavy loads, which eliminates the need for an additional wire and reduces the number of pulleys required. This simplifies the design, maintenance, and reduces the cost of the crane, while also preventing complications that might arise from using two wires.

Problems solved by technology

This can occur with other elements of the nacelle which are generally heavy and bulky, making it necessary to use large cranes to perform these tasks, like what occurs with the blades.

Cranes of this type are furthermore very expensive, so the wind farm installation cost or the cost of the maintenance tasks increases significantly due to the use thereof.

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